/*
 * Copyright 2006 IBM Corporation
 * IUCV protocol stack for Linux on zSeries
 * Version 1.0
 * Author(s): Jennifer Hunt <jenhunt@us.ibm.com>
 *
 */

#ifndef __AFIUCV_H
#define __AFIUCV_H

#include <asm/types.h>
#include <asm/byteorder.h>
#include <linux/list.h>
#include <linux/poll.h>
#include <linux/socket.h>

#ifndef AF_IUCV
#define AF_IUCV		32
#define PF_IUCV		AF_IUCV
#endif

/* Connection and socket states */
enum {
	IUCV_CONNECTED = 1,
	IUCV_OPEN,
	IUCV_BOUND,
	IUCV_LISTEN,
	IUCV_SEVERED,
	IUCV_DISCONN,
	IUCV_CLOSING,
	IUCV_CLOSED
};

#define IUCV_QUEUELEN_DEFAULT	65535
#define IUCV_CONN_TIMEOUT	(HZ * 40)
#define IUCV_DISCONN_TIMEOUT	(HZ * 2)
#define IUCV_CONN_IDLE_TIMEOUT	(HZ * 60)
#define IUCV_BUFSIZE_DEFAULT	32768

/* IUCV socket address */
struct sockaddr_iucv {
	sa_family_t siucv_family;
	unsigned short siucv_port;	/* Reserved */
	unsigned int siucv_addr;	/* Reserved */
	char siucv_nodeid[8];	/* Reserved */
	char siucv_user_id[8];	/* Guest User Id */
	char siucv_name[8];	/* Application Name */
};

/* Common socket structures and functions */
struct sock_msg_q {
	struct iucv_path *path;
	struct iucv_message msg;
	struct list_head list;
	spinlock_t lock;
};

#define iucv_sk(__sk) ((struct iucv_sock *) __sk)

struct iucv_sock {
	struct sock sk;
	char src_user_id[8];
	char src_name[8];
	char dst_user_id[8];
	char dst_name[8];
	struct list_head accept_q;
	spinlock_t accept_q_lock;
	struct sock *parent;
	struct iucv_path *path;
	struct sk_buff_head send_skb_q;
	struct sk_buff_head backlog_skb_q;
	struct sock_msg_q message_q;
	unsigned int send_tag;
};

struct iucv_sock_list {
	struct hlist_head head;
	rwlock_t lock;
	atomic_t autobind_name;
};

unsigned int iucv_sock_poll(struct file *file, struct socket *sock,
			    poll_table * wait);
void iucv_sock_link(struct iucv_sock_list *l, struct sock *s);
void iucv_sock_unlink(struct iucv_sock_list *l, struct sock *s);
int iucv_sock_wait_state(struct sock *sk, int state, int state2,
			 unsigned long timeo);
int iucv_sock_wait_cnt(struct sock *sk, unsigned long timeo);
void iucv_accept_enqueue(struct sock *parent, struct sock *sk);
void iucv_accept_unlink(struct sock *sk);
struct sock *iucv_accept_dequeue(struct sock *parent, struct socket *newsock);

#endif /* __IUCV_H */
